[Captain Bunny]

Yep, as stikor says they shoot pellets.
Its basically paintball with pellets.

you do NOT want to be hit by a psg1 sniper pellet. heavy things and they hurt like hell!
I have a g3 sg1, a brilliant all round gun, great for sniping, assault, and support. i fitted upgraded gears, so its shoots harder and faster. People think its just standard, and that it doesnt have good range, but they soon find out different cool:
I have a soccom sidearm and its fun clearing out a building or bunker with one, kind of like an insult kill, like pistol whipping in MOHAA.
I got a direct hit by a grenade one time, i had to miss the rest of the game as i couldnt walk without hurting. All in good fun though
Its an expensive hobby though....but a great laugh.